Note 200 — Chapter VII · (continued 2)

"There is a prescription for securing the fertility of the fields and perpetual repetition of their produce. If this prescription be consistently carried out it will prove more remunerative than any which has ever been applied in agriculture. It is this: Let every farmer, like the Chinese coolie, who carries a sack of corn or a hundred weight of rape, or carrots or potatoes, etc., to town, bring back with him as much if possible or more of the ingredients of his field products as he took with him, and restore it to the field whence it came. He must not despise a potato paring or a straw, but remember that one of his potatoes still needs a skin, and one of his ears of corn a stalk. The expense for this importation is slight, the outlay secure; a savings bank is not securer, and no investment brings in a higher rate of interest. The returns of his fields will be doubled in ten years: he will produce more corn, more meat and more cheese without expending more time or labor, and he will not be driven by constant anxiety to seek for new and unknown means, which do not exist, to make his ground fertile in another manner.... Old bones, soot, ashes, whether washed out or not, and blood of animals and refuse of all kinds ought to be collected in storehouses, and prepared for distribution.... Governments and town police should take precautions for preventing the loss of these materials by a suitable arrangement of drains and closets."—Liebig's "Chemical Letters."